Apparatus for feeding liquid fuel to carbureters



APPLICATION FILED JAN. N, 191 9.

m V 2,. (M... a Y m 6 4 & w M S 2 Patented J an. 20, 19:20

c. H. ANDERSON. APPARAT US FO R FEEDING LIQUID FUEL T0 CARBURETERS.

APPLICATION FILED JAN. 17-. I919.

Patentd J an. 20, 1920.

2 SHEETS SHEET 2.

CHARLES H. ANDERSON, OF LEXINGTON, KENTUCKY.

APPARATUS FOR FEEDING LIQUID FUEL TO CARBURETERS.

Specification of Letters Patent.

Patented Jan. 26, 1920.

Application fled January 17.1918. Serial No. 271,649.

resident of Lexington. in the county of Fayette and State of Kentucky, have in- -vented certain new and useful Iinprmemenis in Apparatus for Feeding Liquid Fuel to Carburetors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in apparatus for feeding liquid fuel to carbnreters, to provide a liquid fuel feed tern in which the fuel is drawn from a main tank by suction and ted to the carburetor by gra ity.

With this object in View my invention consists in the parts and combinations of parts as will be more fully explained and pointed .out in the claims.

In the accompanying drawings; Figure 1 is av view of the auxiliary tank connected with the suction pipe ot an internal combust-ion engine, the suction pipe being in sec tion; Fig. 2 is a view in section of the auxiliary tank; Fig. 3 is a. plan of the tank the top of the latter beiiig removed; Fig. i is aview similar to Fig. 2 of a modification and Fig; 5 is a diagrammatic view of the two tanks and suction pipe of an engine.

4t represents a tank preterably made of sheet metal. pernmnently closed at one end provided at its other end with a removable head 5. The head is provided centrally with the combined coupling and valve seat (3. which is coupled by a pipe to the main gasolene supply and is provided adjacent its inner end with a seat for the needle valve 8. The needle. valve passes upwardly through the tank 1 and is provided at its upper end with a grooved collar 9. the groove of which receives the inner ends of the weighted levers 10 which are pivoted to the head 11 secured to the upper end of the tube 12. This tube is secured at its lower end in the coupling 6. and-embraces the valve 8; is of greater internal diameter than the valve so that the gasolene or other liquid can pass freely up and around the valve. and is provided adjacent its upper end with holes 13 through which the gasolene passes into the tank.

Surrounding the tube 12 and freely movable thereon is the float 14, which is so'lo- (ated with relation to the levers 10 that when the float rises, it engages the outer weighted ends of the said levers and lifts them and correspondingly depresses their inner ends. which being in engagement with the collar 9 on the needle valve 8, forces the latter downwardly and closes the liquid inlet opening the lovers being maintained in a position to properly engage the float by the head 11 on which they rest when the float is down. I

Secured to one side of the tank is a coupling 15, connected externally by pipe 16 with the suction pipe 16 or manifold of a gasolene engine, and connnunicating internally with pipe 17 which extends up into the tank above the highest level of gasolene therein, the said level being indicated by a dotted line.

Secured to the side of the tank below the normal liquid level is the coupling 18, provided internally with the outlet pipe 19, which terminates vbelow the normal liquid level, and n'ovided externally with the pipe 20 which leads to the spray nozzle 20 in the suction pipe 1(3 of the engine for supplying Q'asolene to the latter.

In the construction shown in Fig. 1. the feed from the spray nozzle 20 has a needle valve 21 which regulates the supply of gasoleue to the carburetor or suction pipe and when this valve is closed the supply through pipe 20 stops.

The pipes 16 and 20 are both connected to the carburcter or suction pipe of the engine between the latter and the butterfly or throttle valve hence when the engine is running the suction in the suction pipe 1G" acting through pipes 16 and 17 and coupling 15. will create a partial vacuum in the tank 4 which operates to draw in the gasolene through coupling- G from the main tank. As the gasolcne fills the tank the float rises and by its engageu'lent with the levers 10 closes valve 8 and cuts off the supply when the floatreaches its normal level. As both pipes 16 and 20 are connected with the suction, pipe oi the engine between the latter and the throttle valve, there will also be a suction through pipe 20 equal to that in pipe 16, so that the suction through both pipes. above and below the gasolene, will be balanced. with the result that gasolene will be drawn through pipe 204and fed to the spray nozzle so long as the needle valve of the latter remains open. When it is closed.

the engine stops, hence while the engine ,is working the vacuum createdby the suction through pipes 16 and 17 draws in the gasolene from the main supply tank, while the suction through pipe 20 feeds the gasolene from the auxiliary tank to the carbureter.

.The construction above described is particularly adapted for use with carburetors having an automatic regulator and cut off for the gasolene as disclosed in my applica-. tion Serial No. 271,648 filed Jan; 17,1919.

In Fig. 4 I have shown a construction in which the supply of gasolene to the pipe leading tothe carbureter or spray nozzle is automatically cut off as soon as the engine is stopped, thus adapting it among other things for use with a carburetor having a regulating valve but no out off valve.

In Fig. l the coupling 18 is provided with a seat for the valve 18 on the lower end of the rod 18. This rodextends upwardly to a point above the normal level of the gasolene in tank 4, and through a long sleeve 18 which preferably extends below-the normal liquid level for preventing the entrance of any air to the vacuum space above the liquid, and is provided at a point above the topiof the tank with a diaphragm 18 secured at its edges within the chamber 18 The portion of thechamber below the diaphragm is open to the outer air, while the part thereof above the diaphragm is connected by port 18 with the upper part of tank 4. With thisfconstruction when the engine is working, the vacuum in the upper part of tank 4 lifts the diaphragm and the valve 18 connected therewith and permits of the free flow of oil -to the carbureter. When the engine stops :and the vacuum is broken as previously explained, the diaphragm and its connected valve drop thus shutting off, the supply of oil to the carbureter.

With these construc ions,- by arranging the two 1 e connections with the suction pipe of the engine between the engine and the throttle valve, suction on the fuel in the tank and in the outlet or nozzle pipe will be.

balanced thus leaving the gasolene free to flow out under any head in the auxiliary tank. I

It is evident that many slight changes might be resorted to in. the relative arrange ment of parts shown and described without departing from the spirit, and scope of my invention, hence I would have itunderstood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a vacuum feed for internal combustion engines, the combination of a fuel tank having a pipe connection above and a pipe connection below the normal fuel level in the tank, with the suction pipe of the engine and at the same side ,of the throttle valve in the suction pipe, whereby the vacuum in the two pipe connections with the suction pipe willbe balanced,'a spray noz- 'zle in the suction pipe and connected with the fuel pipe leading from below the fuel level, in the tank, and means actuated by the suction for controlling thesupply offuel to the suction pipe through the spray nozzle.

2. Ina vacuum fuel system for internal combustion engines, thecombination of an auxiliary fuel tank having a connection with the main'tank, an automatic valve for controllingthe supply from the maintank to the auxiliary tan twov pipe connections leading from the auxiliary tank abovethe normalfuel level in the latter for creating a vacuum in the tank, and the other pipe,

from the auxiliary tank to the suction pipe I of the engine, one of said pipe connections connection leading from the tank below the normal fuel level, a spray nozzle located in the suction pipe with its discharge end in a plane below the normal fuel level of the fuel in the auxiliary tank, the said nozzle bein connected with said last mentioned pipe-an a valve actuated by the suction for controlling the supply of fuel passing through the spray nozzle to the suction pipe.

3. In a vacuum feed system for internal combustion engines, the combination of an auxillary fuel tank having automatic valve arrangement for controlling the feed of fuel from the main tank to the auxiliary tank, a

suction pipe having afluid discharge nozzle therein, a pipe connection leading from the auxiliary tank below the normal fluid level in the auxiliary'tank to said nozzle, a pipe connection leading from the upper partof the auxiliary tank to the suction pipe, the two pipe connections with the suction pipe being between the engine and the throttle valve in the suction pipe whereby the fuel normal fluid level is in a plane above the nozzle, a pipe connection from said tank and below the normal fluid level with said nozzle, a pipe-connection between said suction pipe and the tank above the normal. fluid level, the said latter ipe connection with the suction pipe and t e nozzle being between the engine and the throttle'valve in the suction pipe whereby the suction at the nozzle and the suction above the oil in the auxiliary tank will be balanced, a pipe In. testimony whereof, I have signed this connection from said tank to a main supply specification in'the presence of two subscribtank an automatic valx e for regulating the ing Witnesses.

feed from the main tank to the auxiliary CHARLES H. ANDERSON. 5 tank and alvalve operated by the suction for Witnesses: controlling the supply of fuel passing A. W. BRIGHT,

through the spray nozzle to the suction pipe. R. M. PARKER. 

